Mexico has union free productive manufacturing labor with skills and an excellent work ethic unlike the USA which has union distorted labor force with an entitlement attitude and unskilled workers with poor work ethic.Who is going to win the superior workforce battle?

The other reason is because in Australia there are laws to protect the shareholders from being raped by management unlike the US where it is considered sporting to grant excessive pay packages to executives even as they run the company into the ground. Also their currency is not being actively and immorally debased by the political elite so that your profits will in fact be profits and not some worthless paper better suited for personal hygeine purposes.